CATALYTIC SYSTEM FOR CONVERSION OF AMMONIA Russian patent published in 2017 - IPC B01J23/42 B01J23/881 B82B3/00 

FIELD: chemistry.

SUBSTANCE: system including a catalyst package comprising, in the first stage, a layer of catalyst meshes of platinoid alloys and a collecting bag in the second stage is described. As a collecting bag, the catalytic system comprises a layer of self-regenerating SCS catalyst screens having a catalytic and collecting action made of, at least, one heat-resistant steel containing the components at the following ratio, wt%: Fe 70, Cr 25, Al 5; Fe 71, Cr 23, Al 5, Ti 1; Fe 69, Cr 25, Al 5, Ni 1, on the surface of which a nanocrystalline layer of platinum is applied in an amount of 0.20-0.40 wt % of the components of the steel.

EFFECT: reduction of irretrievable losses of platinoids and reduction of platinoid insertion into each particular ammonia conversion unit.

5 ex